Hi @ssefer
From the short log, it looks like the SDK is able to connect to the node, but takes a little much time to open the bucket. How good is the network link between the two machines? Is this a VM/cloud machine?

As a side note, you should always reuse the CouchbaseEnvironment, CouchbaseCluster and Bucket instances once created (usually by making them public static somewhere, or a Spring singleton, etc…).
These are thread safe and should be shared (and they are expensive to create anyway).